Silver Age: Challengers of the Unknown Comic

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The heroes living on borrowed time return in a one-shot with a cover by the incredible Joe Kubert (Hawkman, Sgt. Rock, almost everything else)! Hearing that the evil Chronos(who is actually the Atom) is at Ivy University trying to take control of the mysterious time pool, the redoubtable Challs race to the scene but their odds of success get pretty small when they get a taste of Professor Ray Palmer''s shrinking ray!